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Acute Spinal Cord Injury
The spinal cord is a bundle of nerves that carries messages between the brain and the rest of the body.

Age-Related Macular Degeneration (AMD)
Age-related macular degeneration (AMD) is a disease that affects an individual's central vision. AMD is the most common cause of severe vision loss among people over 60. Because only the center of vision is affected, people rarely go blind from this disease. However, AMD can make it difficult of read, drive, or perform other daily activities that require fine, central vision.

All About the Immune System
The purpose of the immune system is to keep infectious microorganisms, such as certain bacteria, viruses, and fungi, out of the body, and to destroy any infectious microorganisms that do invade the body. The immune system is made up of a complex and vital network of cells and organs that protect the body from infection.

Allergies and the Immune System
Allergies are disorders of the immune system. Most allergic reactions are a result of an immune system that responds to a "false alarm." When a harmless substance such as dust, mold, or pollen is encountered by a person who is allergic to that substance, the immune system may react dramatically, by producing antibodies that "attack" the allergen (substances that produce allergic reactions)

Anatomy and Development of the Mouth and Teeth
Children's teeth begin developing in the fetus. Good nutrition from the mother during pregnancy is important in the development of the teeth. The mother's diet should have adequate amounts of calcium, phosphorus, vitamin C, and vitamin D.

Anatomy and development of the mouth and teeth
Children's teeth begin developing in the fetus. Good nutrition from the mother during pregnancy is important in the development of the teeth. The mother's diet should have adequate amounts of calcium, phosphorus, vitamin C, and vitamin D.

Anatomy of the Bone
Bone is living tissue that makes up the body's skeleton. There are three types of bone tissue, including the following:

Anatomy of the Breasts
Each breast has 15 to 20 sections, called lobes, that are arranged like the petals of a daisy.

Anatomy of the Skin
The skin is the body's largest organ, covering the entire body. In addition to serving as a protective shield against heat, light, injury, and infection, the skin also

Anatomy of the Urinary System
The body takes nutrients from food and converts them to energy. After the body has taken the food that it needs, waste products are left behind in the bowel and in the blood.

Anatomy: Fetus in Utero
amniotic sac - a thin-walled sac that surrounds the fetus during pregnancy. The sac is filled with amniotic fluid - liquid made by the fetus and the amnion (the membrane that covers the fetal side of the placenta) which protects the fetus from injury and helps to regulate the temperature of the fetus.

Arrhythmias
An arrhythmia (also referred to as dysrhythmia) is an abnormal rhythm of the heart, which can cause the heart to pump less effectively.

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